I didn't even realise this was released for the snes! Fond memories of it on the spectrum. Might need to crank up the old emulator when I get the time.

Hyperkin’s products, especially the retron line, are generally considered sub-par for this reason. They’re usually just android-based systems that run emulation from a rom they dump from the cart at runtime. Since they’re low-spec and emulation focused without some of the refinements that come to those emulators over time, they have glitches on some games.